隨著水質環境的變化以及人們對健康水質的要求越來越高，現階段使用家用淨水器的比例越來越高，以中國北京為例，每三個家庭就有一個家庭使用家用淨水器。

With the change of water quality environment and people‘s more and more requirements for healthy water quality， the proportion of household water purifiers in Chinese family is higher and higher at this stage。 Take Beijing as an example， one out of every three families has a domestic water purifier。

淨水器濾芯作為關鍵的配件，大多數家庭選擇定期由淨水器廠家來更換濾芯，自己完全不清楚淨水器濾芯具體是什麼，他們的作用分別是什麼。為了使大多數使用者瞭解，我們簡單介紹如下：

As a key part of the water purifier， most families choose to replace the filter cartridges regularly by the water purifier manufacturers or distributors。 They have no idea what the filter cartridge is and what their functions are。 In order to make most users understand well， we briefly introduce as follows：

上圖是一個正常淨水器濾芯的配置，從左往右，逐級過濾。

The figure above shows the configuration of a normal set of filter cartridges， from left to right， step by step。

他們的作用分別是什麼呢？如下介紹：

What are their roles？ It is described as follows：

PP棉：PP棉濾芯主要原料是聚丙烯，也叫聚丙烯熔噴濾芯，是採用無毒無味的聚丙烯粒子製成的管狀濾芯。PP棉濾芯的過濾精度0。5μm（微米）到20μm不等。主要用來過濾水中的泥沙、鐵鏽、膠體、蟲卵等雜質，通常是作為淨水器的第一級濾芯，更換週期為2到4個月。

PP filter： the main material of PP filter is polypropylene， it is a tubular filter cartridge made of non-toxic and tasteless polypropylene granules。 The filtration accuracy of PP filter cartridge ranges from 0。5 μm to 20 μm。 It is mainly used to filtering sediment， rust， colloid， insect eggs and other impurities in water。 It is usually used as the first stage of filter cartridges in water purifier， and the replacement cycle is 2 to 4 months。

活性炭：分為顆粒活性炭（UDF）和壓縮活性炭、燒結活性炭（CTO），原材料主要有木質炭、煤質炭，果殼炭、石油焦、再生炭和樹脂活性炭幾大類。主要用來吸附水中的餘氯，通常是作為淨水器的第二、三級濾芯，更換週期一般為6至8個月。

Activated carbon： it is divided into granular activated carbon filter （UDF）， someone also call it as GAC， compressed activated carbon filter and sintered activated carbon （CTO）。 The main materials are wood carbon， coal carbon， shell carbon， petroleum coke， regenerated carbon and resin activated carbon。 It is mainly used to adsorb the residual chlorine in water。 It is usually used as the second（CTO） and third（UDF） filter cartridges in water purifier。 The replacement cycle is generally 6 to 8 months。

反滲透膜：孔徑為0。0001微米，大於0。0001μm（即0。1nm）的物質，水中的溶解鹽類、膠體、有機物、重金屬、細菌、病毒等其他物質都會被截留，是目前市面上最精細的一種膜分離產品。通常作為淨水器的第四級濾芯，相對於其他的濾芯來說，流經反滲透膜的水更純淨。更換週期為12至24個月。另外，反滲透膜元件會產生廢水。不產生廢水的膜元件一定不是反滲透膜。

Reverse osmosis membrane： the material with pore size of 0。0001 μm， larger than 0。0001 μm （i。e。 0。1nm）， and other substances in water， such as dissolved salts， colloids， organic matter， heavy metals， bacteria， viruses， will be intercepted。 It is the most refined membrane separation product on the market at present。 As the fourth stage of filter cartridge in water purifier， the water flowing through reverse osmosis membrane is more pure than other filter cartridges。 The replacement period is 12 to 24 months。 In addition， reverse osmosis membrane components will produce waste water。 A membrane element that does not produce waste water must not be a real reverse osmosis membrane。

T33後置碳：材質也是活性炭，作為最後一級濾芯，作用是進一步去除異味、餘氯並抑制細菌，防止淨化水的二次汙染，改善淨化水的口感，使淨化水喝起來更好喝。更換週期是6-8個月。

T33 rear carbon： it is also made of activated carbon。 As the final filter cartridge， it can further remove odor and residual chlorine， inhibit bacteria， prevent secondary pollution of purified water， improve the taste of purified water， and make purified water drink better。 The replacement period is 6-8 months。

希望透過上述介紹，大家可以更加了解常用的淨水裝置，更準確和自由的選擇適合自己的產品。

I hope that this introduction will let you know more about the water purification devices， and choose your own products more accurately and freely。

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